[toni]

But "Treehouse" is a company. Usually a human at a company sends an email. Who in Treehouse sent that update? Because then we can ask him/her what section of App Store guidelines they were supposedly violating.

[hanley]

There was a better link posted earlier today with all the information you are requesting. https://news.ycombinator.com/item?id=6103149

[alayne]

Was the Android content bundled? Could the app download it to work around the rule?

[JohnTHaller]

Considering that Apple has rejected books for containing links to competing websites, this isn't really a stretch.